Analytical application of 2f-wavelength modulation for isotope selective diode laser graphite furnace atomic absorption spectroscopy

被引：0
|
作者：
H. D. Wizemann
机构：
[1] Universität Hohenheim,
[2] Institut für Physik (120),undefined
[3] Garbenstraße 30,undefined
[4] D-70599 Stuttgart,undefined
[5] Germany e-mail: wizemann@uni-hohenheim.de,undefined
来源：
Fresenius' Journal of Analytical Chemistry | 2000年 / 366卷
关键词：
Graphite; Isotope Ratio; Diode Laser; High Selectivity; Absorption Spectroscopy;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Experiences in the analytical application of the 2f-wavelength modulation technique for isotope selective atomic absorption spectroscopy in a graphite furnace are reported. Experimental as well as calculated results are presented, mainly for the natural lithium isotopes. Sensitivity, linearity, and (isotope) selectivity are studied by intensity modulation and wavelength modulation. High selectivities can be attained, however, on the cost of detection power. It is shown that the method enables the measurement of lithium isotope ratios larger than 2000 by absorption in a low-pressure graphite tube atomizer.
引用
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页码：152 / 155
页数：3
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